On Fri, 12 Mar 2021 at 06:37, Bin Meng bmeng.cn@gmail.com wrote:
At present we decode simple bus <ranges> using the following assumption:
- parent #address-cells 1
- child #address-cells 1
- child #size-cells 1
However this might not always be the case.
Update to use fdt_addr_t and fdt_size_t in 'struct simple_bus_plat', and use fdt_read_ranges() to correctly decode it according to the actual parent and child #address-cells / #size-cells under a Kconfig option CONFIG_SIMPLE_BUS_CORRECT_RANGE which can be turned on for any board that needs it.
Signed-off-by: Bin Meng bmeng.cn@gmail.com
Changes in v2:
- include <asm/global_data.h>
- use a Kconfig option CONFIG_SIMPLE_BUS_CORRECT_RANGE to control the new behavior for boards that want this
drivers/core/Kconfig | 13 +++++++++++++ drivers/core/simple-bus.c | 32 +++++++++++++++++++++++++------- include/dm/simple_bus.h | 6 +++--- 3 files changed, 41 insertions(+), 10 deletions(-)
Reviewed-by: Simon Glass sjg@chromium.org